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Abstract

The objective of this work was to study coal gasification in a pressurised fluidised bed. It included: (i) the design and start-up of a small scale plant for coal gasification in a fluidised pressurised bed; (ii) the study of the hydrodynamic behaviour of pressurised fluidised beds; (iii) the development of an appropriate methodology for the treatment of Spanish high ash and sulphur coals; (iv) the determination of the optimum operating conditions and development of the mathematical model of the system for scale-up. A laboratory plant was designed, constructed and installed at the Universitat Politècnica de Catalunya (UPC) facilities in Barcelona. The reactor design incorporates a double vessel system to decouple pressure and temperature, simultaneously, thus reducing investment costs and simplifying the mechanical design. The experimental plant proved adequate to test and develop the coal gasification methodology in a pressurised bed reactor. Hydrodynamic tests showed that the minimum fluidisation velocity was significantly influenced by pressure when particle size increased, while bed expansion was not affected. Voiding at incipient fluidisation was not affected by pressure changes. Fluidised bed gasification tests were performed at different pressures without problems of agglomeration and sintering. Mathematical modelling was carried out to predict the variation of gas composition and coal conversion as a function of pressure with satisfactory results.

Additional information

Authors: PUIGJANER L, Universitat Politècnica de Catalunya, Barcelona (ES);LLOP M F, Universitat Politècnica de Catalunya, Barcelona (ES);COLL T, Universitat Politècnica de Catalunya, Barcelona (ES);ARNALDOS J, Universitat Politècnica de Catalunya, Barcelona (ES);CASAL J, Universitat Politècnica de Catalunya, Barcelona (ES)
Bibliographic Reference: EUR 14202 EN (1992) 109 pp., MF, ECU 8, blow-up copy ECU 16.50
Availability: (2)
Record Number: 199211239 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en